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Finding the Fourth Proportional to 1,351.87, 2,027.87 and 486.20

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Solution

The fourth proportional to 1,351.87, 2,027.87 and 486.20 is: 729.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.87 : 2,027.87 = 486.20 : x
  2. Step 2: Convert to fraction form
    1,351.87/2,027.87 = 486.20/x
  3. Step 3: Cross multiply
    1,351.87x = 2,027.87 × 486.20
  4. Step 4: Simplify right side
    1,351.87x = 985,950.39
  5. Step 5: Solve for x
    x = 985,950.39/1,351.87
  6. Step 6: Final answer
    x = 729.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.